Diagnosing Spots on Dancing Lady Orchids (Oncidium)

Are Those Spots Sunburn or Something Else?

The spots on your Oncidium ("dancing lady") are more likely a fungal infection than sunburn. Fungal lesions often appear as discolored spots that can spread if untreated.

Recommended Treatment

• Spray affected leaves with a copper-based fungicide once per week for a month.
• Ensure good air circulation and avoid wetting foliage during watering.

Alternative Possibility: Virus

If the spots don't respond to fungicide, a virus (such as Cymbidium mosaic virus or Odontoglossum ringspot virus) may be the cause. Viral infections have no cure. If only one leaf is affected, remove it with sterilized tools to prevent spread. Isolate the plant from others.

Prevention

Always sterilize cutting tools between plants. Buy from reputable sources to reduce virus risk.